Light and light energy can be used for practical purposes that go beyond just illuminating a dark room. Light exists in varying frequencies, which range from very mild to scorching hot. Decades ago, medical and scientific researchers discovered that different light spectrums could be employed for various medical and manufacturing purposes. Today, light technology has medical uses that were once inconceivable for patients and their physicians just a few decades ago.

Lasers

Lasers are used in hospitals and clinics to treat chronic pain, inflammation, sleep disorders, and to help injuries heal. Although the names of the particular treatments vary, they mostly fall under the category of low level laser therapy (LLLT). Low-level lasers operate at a much lower frequency than the kinds used in manufacturing. In general, lasers can be used to burn, cut, or destroy tissue to bring about a certain effect. They can be used for removing tumours, sealing varicose veins, and for some eye surgeries concerning the cornea. Lasers can also be used in aesthetic procedures for reducing the appearance of fine lines, wrinkles, sagging skin, and other signs of aging.

Delivery Systems

Specific light spectrums can be used to activate medications used to treat cancer and similar diseases. This is a form of chemotherapy treatment that has been used to destroy tumorous growths. The effectiveness of these distinct types of drugs is increased, and the chances of side effects are lessened significantly. A special light is even used on whitening gel for teeth in order to, basically, turn it on. Ultraviolet light is what activates the teeth whitening chemicals in the gel. In this case, light-emitting diode (LED) lights are used.

Phototherapy

Fluorescent lamps are used to create light wavelengths that can treat seasonal affective disorder (SAD). This is a kind of depression that tends to occur during certain times of the year, especially during the fall and winter months. Light therapy is conducted to give the brain and nervous system an altered sense of time. This is done to trigger the release of serotonin while lessening the release of melatonin—a sleep hormone. Too much melatonin in the body can cause feelings of tiredness and lethargy, while serotonin has an uplifting effect.

The prospects for using light to destroy cancerous tumours have just recently been actualized. Research is still being conducted on the effects of various forms of light on the brain, nervous system, and skin tissue. This practically ensures that more medical and aesthetic treatments will be conceived of by talented medical professionals and scientists.

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